Correspondence; interviews with Mackall's son and daughter-in-law, Henry C. and Margaret (Robertson) Mackall, of Minneapolis, Minn., relating to Mackall, the family business, B.F. Mackall Inc., and John L. Grandin, owner of Grandin Farms and family friend, of Warren, Pa., area (original home of Mrs. Mackall); scrapbook compiled by Marjorie Cruikshank, containing information concerning the estate of Jay Cooke, dredging on the Red River, and Red River Valley history; and newspaper clippings.